const EventEmitter=require('events').EventEmitter;
class Dog extends EventEmitter{
  constructor(name, energy){
    super();
    this.name=name;
    this.energy=energy;
    this.startTimer();
  };
  get name(){
    return this.name;
  };
  get energy(){
    return this.energy;
  }
  setEnergy(e){
    this.energy=e;
    this.startTimer();
  }
startTimer(){
  if(this.timer!=null) return;
this.timer=setInterval(()=>
    {
      if(this.energy>0){
        this.energy--;
        this.emit('bark');

      }else{
       
        clearInterval(this.timer);
        this.timer=null;
      }
    },1000)
}
name='';
energy=0;
timer=null
}
module.exports= Dog
